80 



PAL^ONTOLOGICAL BOTANY. 



Fig. 78. Fig. 79. 



many genera with reticu- 

 lated venation, such as 

 Camptopteris and Thau- 

 matopteris, some of which 

 began to appear at the 

 Keupric epoch. Coni- 

 ferous genera, as Brachy- 

 phyllum (Fig. 81), Taxo- 

 dites, Palissya, and Pence, 

 are found. In the Lias near 

 Cromarty, Miller states 

 that he found a cone with 

 long bracts like those of 

 Pinus bracteata. 



In the Oolitic epoch the 



flora consists of numerous 



Cycadacece and Conifer£e, 



Fig. 80. some of them having pecu- 



Fig. 78. Pterophyllum Pleiningerii, leaf of a fossil Cycad. Fig. 79. 

 Nilssoiiia compta {Pterophyllum comptum of Lindley and Hutton), from 



